In unincorporated St. Louis County, a single-family residence may keep at most 3 dogs, OR 5 cats, OR a combination of 5 dogs and cats with no more than 3 dogs at any time.
The Property Maintenance Code limits household pet counts in unincorporated areas only — each of the 88 incorporated cities sets its own pet limits (often stricter, e.g., 2-dog limits in Clayton). Exceeding the cap triggers a kennel-licensing requirement, which is not allowed in most residential zones. Service and assistance animals are not counted toward the limit.
Notice of Violation from Neighborhood Preservation Program with 30-day cure period; continuing violations referred to Municipal Court with fines up to $1,000.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
St. Louis County, MO
New trees may not be planted on a St. Louis County right-of-way between the sidewalk and the curb (SLCRO §1218.140). Existing right-of-way trees are owned by...
St. Louis County, MO
SLCRO §607.1005 permits residential backyard composting countywide if located ≥3 ft behind the main residential structure, screened from neighbors near prope...
St. Louis County, MO
Grass and weeds on residential property in unincorporated St. Louis County cannot exceed 8 inches in height. Property owners have 7 days after a violation no...
St. Louis County, MO
All lodging facilities inside St. Louis County, including transient home rentals booked through Airbnb, VRBO, and similar online purveyors, must file and pay...
St. Louis County, MO
Under Missouri Constitution Article XIV §2, registered patients and adults 21+ may cultivate up to 6 flowering and 6 non-flowering marijuana plants per regis...
St. Louis County, MO
Missouri Amendment 3 (2022) legalized adult-use cannabis. St. Louis County allows licensed dispensaries in commercial zones subject to local zoning review. M...
See how St. Louis County's pet limits rules stack up against other locations.
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